X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fmatrix.cpp;h=a4c36a022a9ecb338406a496760f12c1d0655540;hp=7a91078621e647d293af0628d06044c95e719fcd;hb=9d1fa012a23693768bbe287371e97751c03acc50;hpb=4c89817d6e060323ec1ddd275f3265cea688c650

diff --git a/source/matrix.cpp b/source/matrix.cpp
index 7a910786..a4c36a02 100644
--- a/source/matrix.cpp
+++ b/source/matrix.cpp
@@ -1,43 +1,208 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
+#include <algorithm>
+#include <cmath>
+#include <msp/geometry/affinetransformation.h>
+#include <msp/gl/extensions/msp_legacy_features.h>
+#include "error.h"
 #include "matrix.h"
 
+using namespace std;
+
 namespace Msp {
 namespace GL {
 
-void matrix_mode(MatrixMode m)
+Matrix::Matrix():
+	Base(Base::identity())
+{ }
+
+Matrix::Matrix(const float *m):
+	Base(m)
+{ }
+
+Matrix::Matrix(const LinAl::Matrix<float, 4, 4> &other):
+	Base(other)
+{ }
+
+Matrix &Matrix::translate(const Vector3 &t)
+{
+	return multiply(translation(t));
+}
+
+Matrix &Matrix::rotate(const Angle &a, const Vector3 &x)
+{
+	return multiply(rotation(a, x));
+}
+
+Matrix &Matrix::scale(const Vector3 &s)
+{
+	return multiply(scaling(s));
+}
+
+float Matrix::operator[](unsigned i) const
+{
+	if(i>=16)
+		throw out_of_range("Matrix::operator[]");
+	return operator()(i%4, i/4);
+}
+
+Matrix Matrix::translation(const Vector3 &t)
+{
+	return Geometry::AffineTransformation<float, 3>::translation(t).get_matrix();
+}
+
+Matrix Matrix::rotation(const Angle &a, const Vector3 &x)
+{
+	return Geometry::AffineTransformation<float, 3>::rotation(a, x).get_matrix();
+}
+
+Matrix Matrix::scaling(const Vector3 &s)
+{
+	return Geometry::AffineTransformation<float, 3>::scaling(s).get_matrix();
+}
+
+Matrix Matrix::ortho(float l, float r, float b, float t, float n, float f)
+{
+	if(l==r || b==t || n==f)
+		throw invalid_argument("Matrix::ortho");
+
+	Matrix result;
+	result(0, 0) = 2/(r-l);
+	result(1, 1) = 2/(t-b);
+	result(2, 2) = -2/(f-n);
+	result(0, 3) = -(r+l)/(r-l);
+	result(1, 3) = -(t+b)/(t-b);
+	result(2, 3) = -(f+n)/(f-n);
+	return result;
+}
+
+Matrix Matrix::ortho_centered(float w, float h)
+{
+	return ortho(-w/2, w/2, -h/2, h/2, -1, 1);
+}
+
+Matrix Matrix::ortho_bottomleft(float w, float h)
+{
+	return ortho(0, w, 0, h, -1, 1);
+}
+
+Matrix Matrix::ortho_topleft(float w, float h)
 {
-	glMatrixMode(m);
+	return ortho(0, w, h, 0, -1, 1);
 }
 
-void load_identity()
+Matrix Matrix::frustum(float l, float r, float b, float t, float n, float f)
 {
-	glLoadIdentity();
+	if(l==r || b==t || n<=0 || f<=n)
+		throw invalid_argument("Matrix::frustum");
+
+	Matrix result;
+	result(0, 0) = 2*n/(r-l);
+	result(1, 1) = 2*n/(t-b);
+	result(0, 2) = (r+l)/(r-l);
+	result(1, 2) = (t+b)/(t-b);
+	result(2, 2) = -(f+n)/(f-n);
+	result(3, 2) = -1;
+	result(2, 3) = -2*f*n/(f-n);
+	result(3, 3) = 0;
+	return result;
+}
+
+Matrix Matrix::frustum_centered(float w, float h, float n, float f)
+{
+	return frustum(-w/2, w/2, -h/2, h/2, n, f);
+}
+
+Matrix Matrix::perspective(const Angle &h, float a, float n, float f)
+{
+	float hh = tan(h/2.0f)*n;
+	return frustum(-hh*a, hh*a, -hh, hh, n, f);
+}
+
+
+GLenum MatrixStack::current_mode = GL_MODELVIEW;
+
+MatrixStack::MatrixStack(GLenum m):
+	mode(m)
+{
+	matrices.reserve(mode==GL_MODELVIEW ? 32 : 4);
+	matrices.push_back(Matrix());
+}
+
+MatrixStack::MatrixStack():
+	mode(0)
+{
+	matrices.reserve(32);
+	matrices.push_back(Matrix());
+}
+
+const Matrix &MatrixStack::top() const
+{
+	return matrices.back();
+}
+
+void MatrixStack::load(const Matrix &m)
+{
+	matrices.back() = m;
+	update();
+}
+
+void MatrixStack::multiply(const Matrix &m)
+{
+	matrices.back() *= m;
+	update();
+}
+
+void MatrixStack::push()
+{
+	matrices.push_back(top());
+}
+
+void MatrixStack::pop()
+{
+	if(matrices.size()==1)
+		throw stack_underflow("MatrixStack::pop()");
+
+	matrices.pop_back();
+	update();
+}
+
+void MatrixStack::update()
+{
+	if(!mode)
+		return;
+
+	static Require _req(MSP_legacy_features);
+
+	if(mode!=current_mode)
+	{
+		glMatrixMode(mode);
+		current_mode = mode;
+	}
+
+	glLoadMatrixf(matrices.back().data());
 }
 
-void mult_matrix(const float *matrix)
+MatrixStack &MatrixStack::operator=(const Matrix &m)
 {
-	glMultMatrixf(matrix);
+	load(m);
+	return *this;
 }
 
-void mult_matrix(const double *matrix)
+MatrixStack &MatrixStack::operator*=(const Matrix &m)
 {
-	glMultMatrixd(matrix);
+	multiply(m);
+	return *this;
 }
 
-void push_matrix()
+MatrixStack &MatrixStack::modelview()
 {
-	glPushMatrix();
+	static MatrixStack ms(GL_MODELVIEW);
+	return ms;
 }
 
-void pop_matrix()
+MatrixStack &MatrixStack::projection()
 {
-	glPopMatrix();
+	static MatrixStack ms(GL_PROJECTION);
+	return ms;
 }
 
 } // namespace GL